Rotary engine



(No Model.) 4 Sl1eetsSheet 2.

W. S. BATE. ROTARY ENGINE.

Patented Apr. 26,1898.

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(No Model.) 4 SheetsSheet 3 W. S. BATE.

BOTARY ENGINE. No. 602,930. PatentedApr. 26,1898.

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WILLIAM S. BATE, OF BROOKLYN, NEW YORK.

ROTARY ENGIN E.

SPECIFICATION forming part of Letters Patent No. 602,930, dated April 26, 1898.

Application filed A il 3,1897. Serial No. 630,550. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM S. BATE, of the city of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Rotary Engines, of which the following is a specification.

My invention relates to motors, and particularly to improvements in rotary engines having reversible concentric pistons; and the objects in view are to furnish a machine of simple construction, with means for providing a constant and uniform supply of steam or other motive agent and for the most efiicient and economical use of the same. These valuable and original features will be set forth in the following description, and their elements of novelty will be particularly pointed out in the appended claims.

In the drawings, Figure 1 is a perspective view of a motor embodyingmy improvements. Fig. 2 is a vertical section of the same, perpendicular to the axis of rotation of the piston; and Fig. 3 is a vertical section parallel with the axis of rotation upon plane of line A B, Fig. 2. Fig. 4 represents a modified method of arranging the sliding valves and lifting-rods shown in the other drawings.

Similar numerals of reference indicate corresponding parts in all the figures of the draw- Ings.

1 designates the casing, which is of cylindrical shape and provided with a base 2, having means for attachment to a fixed object, such means consisting in vertical bolt-holes 3, adapted for the reception of fasteningbolts.

Fixed to or integral with the casing, preferably at its upper side, is a valve-casing at, having a tapered transverse bore 5, in which is revolubly mounted the tapering plug 6. This throttle or reversing plug is held in steam-tight contact with the walls of the easing a by means of a tension-spring 7,which is held in place by the nut 8, which is threaded upon a reduced extension of the said plug. This plugis provided witha passage 10,which may be brought into communication with either of the twin inlet-ports 9 and 9%; with which the cylinder 1 is provided and convey steam or other motive agent to them from the inlet opening 11 of the valve casing (and through them to the interior of the cylinder) lever 13.

by the movement to and fro of the reversing- Said lever is fixed to the projecting portion of the plug of the throttle-valve 6 and operates adjacent to a segmental rack 14, being provided with a locking-pawl 15 to engage the notches of the said rack.,said pawl being held in operative relation with the rack by means of a spring 16.

The exhaust-port 12 is located diametrically opposite the inlet-ports and in the construction illustrated in the drawings is formed in the base of the cylinder.

Within the cylinder the piston 17 is fixed to the shaft 18,with its periphery contiguous to the inner surface of the cylinder. The piston is cored or recessed to form pockets 19, terminating at both ends in abrupt concave abutments 20 and 20%; to provide for the reversal of the motion of the piston. To one end of the piston-shaft 18 is attached a pulley or driven wheel 28, and to the other end a fly-wheel 29.-

So far I have described features of my motor which are already known to the art and which I do not claim as original with myself 5 but I will now proceed to specify such parts as I believe to be new and of my own invention and which I desire to secure by Letters Patent.

By reference to Fig. 2 of the drawings it will be seen that instead of putting the inletports 9 and 9% into single and direct communication with the interior of the cylinder I make each of them with two branches 21 and 22 and 21% and 22%, at the entrances of which I place slide-valves 23 and 23:}; to control and regulate the flow of steam to the cylinder. The passages 21 and 21%;, it will be observed, are arranged so as to admit the steam or other agent to the upper part of the cylinder and the passages 22 and 22; to the sides of the same, for reasons that will be fully set forth hereinafter. The slide-valves 23 and 23% are provided with double ports 24 and 25 and 24% and 25%, so arranged in relation to the steampassages21 and 22 and 21-5 and 22% that when steam is admitted to the passage 21 it will be cut off from 22 and when admitted to 21% it will be out off from 22:}, and vice versa.

Around the rods of the slide-valves 23 and 23%,; and confined between the flanges 26 and the guides 27 are placed spiral springs 30, so

arranged that when the valves are lifted from their seats, by means that will hereinafter be described, and the springs thereby compressed they will upon being released carry the valves back into their seats by their expansion.

Fixed to the piston-shaft 18 and at either or both of the vertical sides of the cylindercasin g, as may be preferable, are earns 31, of a generally triangular shape, so situated -in relation to the lifting-rods 32 that their revolution with the piston-shaft and contact with the traveling wheels 33 on the free extremities of the lifting-rods will impart to the latter and to their arms 34 a reciprocating motion and cause them when brought into contact with the lugs 35, attached to the inner sides of the valve-rods 23, to open and close the valveports 24 and 25 and 24 and 25%, asw-ill be hereinafter fully described.

The cams need not be irremovably attached to the cylinder-shaft at the point indicated in the drawings, but so clamped to it that their position in relation to the cylinder-chambers can be shifted and the amount of cut-off be increased or diminished as desired.

A difierent method of arranging the valves and lifting-rods in relation to the cams is shown in Fig. 4, where two independent rods 36 are used 011 each vertical side of the cylinder-casing, but each in connection with a similar and correspondingly-situatedrod: on the other side of the cylinder-casing.

VVhen-it is desired that the motor shallbe single-acting, all the valves on one side of the cylinder-casing and valve-casing may be dis tofiv-eor more the number of passage-ways in-the cylinder-casing and valve-ports in the sliding'valve can be correspondingly added to.

Having described the construction of my improved motor, I will now state its method of operation, which is as follows: Having turnedthe lever 13 to the right, asshown in the drawings, the steamor other motive agent is allowed to pass through'the valve-plug 6, the-inlet-port 9, the valve-port 25, and the passage 2l into the piston recess or chamber 19; The initial pressure of the steam or other motive agent thus admitted drives the piston inthe direction of the arrow in Fig: 2' until the right-hand abutment 20 of the pistonchamber in communication with the motive of the supply-passage 22 by the impact of the steam or other agent. In the meantime the descent of the lifting-rod, caused by the expansion of the springs 30 and the force of gravity, has not only closed the valve-port .25, but also has brought the valve-port 24 into communication with the passage-way 22,

so that by the time the piston-abutment has reached the outlet of said passage-way the full force of the steam or other motive agent is again exerted upon it until it reaches a point midway between said' outlet and the exhaustchamber 12, by which time the ascending movement of the lifting-rod and its branches, actuated by the cam, has once more out off the motive supply; bnt'by the time the before-mentioned abutting surface of the piston-has reached the exhaust-chamber the corresponding abutment of the succeeding piston-chamber has passed the outlet of the supply-passage 2l,which,bein g now again in communication with the power-supply through the valve-port 25, admitsthe fullpressure of said supply to a the newly-presented pistonchamber, asit had to the previous one. one chamber after another ispresented to the Thus supply-passages, and the above-described operation iscontinued as long as the throttlevalve remains open-andthe steam or other motive agent supplied. pensed with. Again, the passages 22 and 22% The reversal of the motor is accomplished by moving the-lever 13, so as to cause the admission of steam or other motive agent through the inlet-port 9?}- to the passage-ways and valves on theother side of the cylinder. Only one slide-valve being necessarily in use at a-time, the one not in service may be raisedout of contact with the arms of the lifting-rods either by the movement of the throttie-valve and lever back and forth-inconnection with some suitable device (not shown in thedrawings) or by means of some other simple and well-known form of mechanism adapted to the purpose.

What I claim as my invention is- 1 A rotary engine havinga casing provided with two ports leading to different partsthereof, a piston, and the plate-valve provided With two portsadapted to admit fluidalternatively to-one or the other of two ports in the casing, substantially as-described.

2; A-rotary engine having a casin g provided with two ports leading to difierent parts thereof, a piston, and the plate-valve provided with two-ports-for admitting fluid alternatively to'one orthe other of the ports inthe casing-and'an inletrportintersecting the casing-portsprovided-With a throttle-valve, substantially asdescribed.

3. A- rotary engine having a casing'with 'twoports leading to different parts thereof on both sides of the casing, a piston, platevalves each having two ports adapted to ad-.

mit fluid alternatively to one or the other of said sets of ports according to the direction in which the engine is running, substantially as described.

4. A rotary engine having a casing provided with two ports leading to difierent parts therea of on both sides of the casing, a piston, two plate-valves each having two ports admitting fluid alternatively to either set of the'ports according to the direction in which the engine is running, and an inlet-port leading to the casing-ports and a combined throttle and reversing-plug, substantially as described.

5. In the valve-casing 4, of a rotary engine, the combination of cylinder inlet-ports 21 and 22, with a slide-valve 23, having steam-ports 24 and 25 and so arranged in relation to said cylinder inlet-ports that the supply of steam or other motive agent through a valve-casing inlet-port 11, and throttle-valve plug 6, may be cut oft from either one of said cylinder inlet-ports, while being admitted to the other, allowing the steam or other motive agent in the cylinder port and chamber so cut ofi' to drive a piston 17.

6. In the valve-casing 4, of a rotary engine the combination of cylinder inlet-ports 21 and 22, and 21-1; and 22%, with slide-valves 23 and having ports 24 and 25, and 24s} and 25%,

and so arranged in relation to said cylinder inlet-ports that the supply of steam or other motive agent through a valve-casing inletport 11, and throttle-valve plug 6 maybe cut oft from either port of such pair of said cylinder-ports as may be in communication with the motive supply, (while being admitted to the other), allowing the steam or other motive agent in the cylinder port and chamber so cut off to drive a piston.

7. A rotary engine having a casing provided with two ports leading to different parts thereof, a plate-valve provided with two ports, a piston, a piston-shaft, a cam on said shaft and connecting mechanism to operate the valve to periodically admit to and cut 0d the supply of fluid to the piston, substantially as described.

8. The improved rotary engine herein described comprising the cylinder-casing with an inlet and an exhaust port, a piston, a throttle-valve, ports leading to different parts of the casing and plate-valves with two ports for cont-rolling the flow of the steam or fluid to the piston and means forperiodically opening and closing said valves, substantially as described.

WILLIAM S. BATE. Witnesses:

THOMAS J. LEE, FRED W. SNYDER. 

